The first time I rode on the Southwest Chief I saw there were a few people who slept on the floor in one of the observation cars. I was later told one could even sleep in a booth in the Cafe after it was closed. Is tis usually allowed or advisable? How about on the floor at the back of the rear car? We rode in the last car on my previous trip and there was a lot of space there. I was told it was OK as long as you don't block a walking path. Is that true? Anything is better that trying to get a restful sleep in a recliner! I am taking a round trip in the near future from Albuquerque to LA in the near future.